I have a 2008 3500hd duramax that I want to try a little sled pulling with. I need some help writing a tune for the TCM to make the truck start in 2nd gear with the tow haul on and 4lo only. Can someone give some pointers on what to change.
thanks.
2nd gear start
I have a 2008 3500hd duramax that I want to try a little sled pulling with. I need some help writing a tune for the TCM to make the truck start in 2nd gear with the tow haul on and 4lo only. Can someone give some pointers on what to change.
thanks.
2008, efi live, 5" exhaust, profab egr delete tube, up pipe, down pipe, air dog 165,cap , block .
The 4 low table is it's own table. Don't believe tow haul works when in 4 low. The indicator light will come on in the cluster for tow haul because the BCM has sent the tow/haul command, but once you go to 4 low it will change to the 4 low shift table. As to how to do it, I believe most reccomend moving the 1-2 shift speed to 0MPH at 50% throttle and above so it will shift to 2nd while you're boosting it up.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
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